/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraComponent.h
Switch which asset the component is using. This requires Niagara to wait for concurrent execution and the override parameter store to be synchronized with the new asset.Bydefault existing parameters are reset when we call SetAsset, modify bResetExistingOverrideParameters to leave existing parameter data as is.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=Niagara, Meta=(DisplayName="Set Niagara System Asset")) void SetAsset ( [UNiagaraSystem](API\Plugins\Niagara\UNiagaraSystem) * InAsset, bool bResetExistingOverrideParameters )